diff --git a/transmission_interface/include/transmission_interface/transmission_loader.hpp b/transmission_interface/include/transmission_interface/transmission_loader.hpp
index c563a5fae6..962ba90d16 100644
--- a/transmission_interface/include/transmission_interface/transmission_loader.hpp
+++ b/transmission_interface/include/transmission_interface/transmission_loader.hpp
@@ -19,6 +19,8 @@
 
 #include "hardware_interface/hardware_info.hpp"
 
+#include "transmission_interface/transmission.hpp"
+
 namespace transmission_interface
 {
 /**